EP3096989B1 - Dispositif de nettoyage d'une lentille optique d'une caméra d'assistance au stationnement - Google Patents

Dispositif de nettoyage d'une lentille optique d'une caméra d'assistance au stationnement Download PDF

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Publication number
EP3096989B1
EP3096989B1 EP15702172.6A EP15702172A EP3096989B1 EP 3096989 B1 EP3096989 B1 EP 3096989B1 EP 15702172 A EP15702172 A EP 15702172A EP 3096989 B1 EP3096989 B1 EP 3096989B1
Authority
EP
European Patent Office
Prior art keywords
fluid
ring body
optical lens
outer ring
parking assistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15702172.6A
Other languages
German (de)
English (en)
Other versions
EP3096989A1 (fr
Inventor
Thomas Niemczyk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3096989A1 publication Critical patent/EP3096989A1/fr
Application granted granted Critical
Publication of EP3096989B1 publication Critical patent/EP3096989B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/04—Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B60S1/522—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms
    • B60S1/528—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms the spreading means being moved between a rest position and a working position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/54—Cleaning windscreens, windows or optical devices using gas, e.g. hot air
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation

Definitions

  • the invention relates to a device for cleaning an optical lens of a parking assistance camera arranged on a vehicle.
  • the invention relates to a parking assistance system for a vehicle, comprising at least one at least one optical lens comprehensive, arranged on the vehicle parking assistance camera.
  • Devices for cleaning an optical lens of a parking assistance camera arranged on a vehicle are known, for example, from the published patent applications DE 100 12 004 A1 and DE 102 25 151 A1 known.
  • parking assistance cameras are directly exposed to external influences, such as the weather. Due to the external influences caused contamination of an optical lens of a parking assistance camera and caused by stone chips damage to the optical lens affect the achievable with a park assist camera image quality, which in particular complicates automated image processing. Another frequently encountered and therefore serious impairment of image quality achievable with a park assist camera is the presence of water droplets on an optical lens of the park assist camera. Deploying park assist cameras in a high airflow location to remove the water droplets present on an optical lens is typically due to design requirements difficult to realize.
  • the object of the invention is to enable optimum cleaning of an optical lens of a parking assistance camera arranged on a vehicle, without permanently limiting an angle of view of the optical lens.
  • the outer annular body is returned to its rest position due to the restoring force acting on it in the direction of its rest position, in particular automatically.
  • the overall arrangement of inner ring body and outer ring body is thus telescopic.
  • the inner ring body is immovably disposed on the optical lens, so can not perform movements relative to the optical lens, it is possible to use the inner ring body as part of the parking assistance camera, for example, as a holder for the optical lens.
  • the inner ring body partially surrounds the optical lens radially outside, in such a way that the angle of view of the optical lens is not impaired by the inner ring body.
  • the inner annular body may be circular, elliptical or oval and in particular adapted to the shape of the optical lens. Also, depending on the application, a polygonal configuration of the inner ring body is possible.
  • the inner ring body may also differ in its shape from an ideal ring in that it has a massive material reinforcement within an outer annular portion.
  • the coaxial with the inner ring body arranged outer ring body may surround the inner ring body radially outside partially or completely. Also, the dimensions of the two annular bodies can be the same, at least in the axial direction.
  • the outer ring body may also be circular, elliptical or oval and adapted in particular to the shape of the inner ring body. In addition, depending on the application, a polygonal configuration of the outer ring body is possible.
  • the loading of the outer ring body in the direction of its rest position with a restoring force for example passively via mechanical means, in particular at least one spring or compression spring, or passively or actively via electromagnetic means.
  • the object space of the optical lens is to be understood as meaning the space in front of the optical lens in which the angle of view of the optical lens and the field of view of the optical lens are also located.
  • the outer ring body is formed such that the fluid chamber is closed in its rest position outer ring body relative to the environment, so that no fluid introduced into the fluid chamber can get into the environment.
  • the outer ring body can in this case cooperate according to a valve with the inner ring body.
  • the outer ring body is further designed such that the fluid chamber is open to the environment when located in its cleaning position outer ring body, that a fluid introduced into the fluid chamber exits the fluid chamber in the direction of the optical lens.
  • the fluid emerging from the fluid chamber for example in the form of a fluid jet, can be directed onto the optical lens for cleaning the optical lens.
  • At least one fluid supply opening into the fluid chamber which may have at least one fluid channel, is arranged on the inner annular body.
  • the fluid supply can be fluid-conducting with a Pressure generating means for generating a pressurized fluid to be connected, wherein the fluid may be gaseous or liquid.
  • the two annular bodies may be made of the same or different materials.
  • a material for example, metal, plastic or a composite material in question.
  • the outer ring body is U-shaped in cross-section and has two legs and a leg connecting the web together, wherein the radially inner leg is shorter than the radially outer leg. If the outer ring body is in its cleaning position, this embodiment forms an annular gap between the inner ring body and the outer ring body, via which the fluid chamber is open relative to the surroundings of the device and via which the optical lens for its optimum cleaning from different directions can be acted upon by a fluid.
  • the radially inner leg of the outer ring body may be formed approximately or as long as the radially outer leg, wherein on the radially inner leg at least one, preferably two or more, outlet openings are arranged, via which the fluid chamber in befindlichem in its cleaning position outer ring body is open to the environment of the device and over which the optical lens can be acted upon for optimum cleaning from different directions with a fluid.
  • At least one nozzle is arranged on the web and / or on the radially inner leg, which is fluid-conductively connectable to the fluid supply or a further fluid supply and which is arranged, a fluid introduced into the nozzle at befindlichem in its cleaning position to direct the outer ring body on the optical lens. Thereafter, the nozzle can be acted upon via the formed on the inner ring body fluid supply or via a separate additional fluid supply for cleaning the optical lens with a fluid.
  • the Pressure loss due to the fluid exiting from the fluid chamber via the at least one nozzle is so small relative to the pressure prevailing in the fluid chamber that the outer annular body remains in its extended cleaning position during cleaning of the optical lens.
  • the fluid chamber is not open to the environment of the device in befindlichem in its extended cleaning position outer ring body, wherein the pressure prevailing in the fluid chamber pressure substantially to the displacement of the outer ring body from its rest position to its cleaning position or a corresponding displacement of the nozzles arranged on the outer ring body is used, whereas the cleaning of the optical lens takes place solely via the nozzles. Only when the fluid chamber is no longer acted upon by a pressurized fluid, the outer annular body is converted by the force acting on him in the direction of its retracted rest position restoring force back into this rest position. At the web and / or the radially inner leg of the outer ring body and two or more nozzles may be arranged circumferentially distributed.
  • a parking assistance system for a vehicle comprising at least one at least one optical lens comprehensive, arranged on the vehicle parking assistance camera, characterized by at least one device according to one of the aforementioned embodiments or any combination thereof.
  • the parking assistance system may also have a separate corresponding device for each optical lens.
  • the parking assistance system has at least one pressure-generating device, connected in fluid-conducting manner with the fluid supply arranged on the inner annular body, for generating a pressurized fluid.
  • the pressure generating device may comprise a pump.
  • the Pressure generating device may be configured to produce a pressurized gaseous fluid, for example compressed air, and / or liquid fluid, for example water with or without detergent additive.
  • the parking assistance system has at least one fluid reservoir for a gaseous or liquid fluid connected in a fluid-conducting manner to the pressure-generating device.
  • a further advantageous embodiment provides that the pressure-generating device is set up to first generate a pressurized fluid and then a pressurized gaseous fluid. In this way, first, a cleaning of the optical lens with the liquid fluid made and then the optical lens for removing the liquid fluid from the optical lens by means of the gaseous fluid, such as compressed air, dried.
  • the gaseous fluid such as compressed air
  • the parking assistance system comprises at least one further pressure-generating device connected to the nozzle arranged on the outer annular body for generating a pressurized fluid.
  • the fluid supply of the inner ring body and the fluid chamber can be used alone to move the outer ring body from its rest position to its cleaning position, whereas the nozzle is used to clean the optical lens.
  • FIG. 1 shows a schematic sectional view of an embodiment of an inventive parking assistance system 1 for a vehicle at rest.
  • the parking assistance system 1 comprises a parking assist camera 3 having an optical lens 2 arranged on the vehicle and a device 4 for cleaning the optical lens 2.
  • the device 4 comprises an immovable and the optical lens 2 radially outside partially surrounding the optical lens 2 arranged inner ring body 5, on which a ring-shaped and the object space 18 of the optical lens 2 out open receptacle 7 is arranged. Furthermore, the device 4 comprises a relative to the common axis 8 coaxial with the inner ring body 5 and in its rest position shown completely disposed within the receptacle 7 outer annular body. 6
  • the outer ring body 6 is between the in FIG. 2 shown extended cleaning position and in FIG. 1 shown retracted position axially movable relative to the inner ring body 5, wherein the outer ring body 6 is acted upon in the direction of its rest position with a restoring force.
  • the restoring force is generated in the embodiment shown by means of tension springs 9.
  • annular fluid chamber 10 is arranged between the inner ring body 5 and the outer ring body 6, an annular fluid chamber 10 is arranged.
  • the outer ring body 6 is formed in cross-section U-shaped.
  • the outer Ring body 6 two legs 11 and 12 and a leg 11 and 12 interconnecting web 13, wherein the radially inner leg 12 is shorter than the radially outer leg 11 is formed.
  • a branching fluid feed 14 which opens into the fluid chamber 10 and may comprise injection nozzles (not shown).
  • the outer annular body 6 is formed such that the fluid chamber 10 is closed when located in its rest position outer annular body 6 relative to the environment of the device 4. Furthermore, the outer ring body 6 is designed such that the fluid chamber 10 is open with its outer annular body 6 in its cleaning position relative to the surroundings of the device 4 that a fluid introduced into the fluid chamber 10 in the direction of the optical lens 2 from the fluid chamber 10th exit, as is in FIG. 2 is shown.
  • the parking assistance system 1 further comprises a pressure-generating device 15, which is connected in a fluid-conducting manner to the fluid supply 14 arranged on the inner annular body 5, for producing a pressurized fluid.
  • the parking assistance system 1 also comprises a fluid reservoir 16 connected to the pressure generating device 15 for a gaseous or liquid fluid.
  • the pressure generating device 15 is configured to first generate a pressurized fluid and then a pressurized gaseous fluid.
  • FIG. 2 shows a schematic sectional view of the in FIG. 1 shown parking assistance system 1 in the cleaning state.
  • the outer annular body 6 is in its cleaning position, whereby the fluid chamber 10 is open relative to the surroundings of the device 4 such that a fluid introduced into the fluid chamber 10 exits the fluid chamber 10 in the direction of the optical lens 2, as indicated by the arrows 17 is indicated.
  • FIG. 2 is schematically shown by the reference numeral 21, a seal up and down to build up the necessary back pressure can.
  • FIG. 3 shows a schematic sectional view of another embodiment of an inventive parking assistance system 1 in the cleaning state.
  • nozzles 19 are arranged on the web, which are fluid-conductively connected to the fluid chamber 10 and thus to the fluid supply 14.
  • a fluid can be conducted in the direction of the optical lens 2, as indicated by the arrows 20.
  • FIG. 4 shows a schematic front view of the in FIG. 3 shown embodiment of an inventive parking assistance system 1.
  • the device 4 far four circumferentially distributed nozzles 19 on.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Water Supply & Treatment (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Camera Bodies And Camera Details Or Accessories (AREA)
  • Studio Devices (AREA)
  • Lens Barrels (AREA)

Claims (8)

  1. Dispositif (4) de nettoyage d'une lentille optique (2) d'une caméra d'assistance au stationnement (3) montée sur un véhicule comprenant :
    - au moins un corps annulaire interne (5) fixe pouvant être monté sur la lentille optique (2) en l'entourant partiellement radialement vers l'extérieur, sur lequel est monté un logement annulaire (7) ouvert vers l'espace objet (18) de la lentille optique (2), et
    - au moins un corps annulaire externe (6) monté coaxialement au corps annulaire interne (5) et au moins partiellement à la partie interne du logement (7),
    caractérisé en ce que
    - le corps annulaire externe (6) est mobile axialement par rapport au corps annulaire interne (5) entre une position de nettoyage déployée et une position de repos repliée,
    - le corps annulaire externe (6) est sollicité par une force de rappel en direction de sa position de repos,
    - au moins une chambre de fluide (10) est située entre le corps annulaire interne (5) et le corps annulaire externe (6),
    - le corps annulaire externe (6) est réalisé de sorte que, lorsqu'il est dans sa position de repos la chambre de fluide (10) soit fermée vis-à-vis de l'environnement du dispositif (4),
    - le corps annulaire externe (6) est réalisé de sorte que, lorsqu'il est dans sa position de nettoyage la chambre de fluide (10) soit ouverte vis-à-vis de l'environnement du dispositif (4) pour qu'un fluide introduit dans la chambre de fluide (10) sorte de cette chambre (10) en direction de la lentille optique (2), et
    - au moins une entrée de fluide (14) débouchant dans la chambre de fluide (10) est positionnée dans le corps annulaire interne (5).
  2. Dispositif (4) conforme à la revendication 1,
    caractérisé en ce que
    le corps annulaire externe (6) a une section en forme de U et comporte deux branches (11, 12) et une barrette (13) reliant les branches (11, 12), la branche interne radiale (12) étant plus courte que la branche externe radiale (11).
  3. Dispositif (4) conforme à la revendication 2,
    caractérisé en ce que
    sur la barrette (13) et/ou sur la branche radiale interne (12) est montée au moins une buse (19) qui peut être reliée fluidiquement à l'entrée de fluide (14) ou à une autre entrée de fluide, et est susceptible de diriger sur la lentille optique (2) un fluide introduit dans celle-ci du corps annulaire externe (6) se trouvant dans sa position de nettoyage.
  4. Système d'assistance au stationnement (1) destiné à un véhicule comprenant au moins une caméra d'assistance au stationnement (3) équipée d'au moins une lentille optique (2),
    caractérisé par
    au moins un dispositif (4) conforme à l'une des revendications 1 à 3.
  5. Système d'assistance au stationnement (1) conforme à la revendication 4,
    caractérisé par
    au moins un dispositif générateur de pression (15) relié fluidiquement à l'entrée de fluide (14) située sur le corps annulaire interne (5) pour permettre d'obtenir un fluide sous pression.
  6. Système d'assistance au stationnement (1) conforme à la revendication 5,
    caractérisé par
    au moins un réservoir (16) de fluide gazeux ou liquide relié fluidiquement au dispositif générateur de pression (15).
  7. Système d'assistance au stationnement (1) conforme à la revendication 5 ou 6,
    caractérisé en ce que
    le dispositif générateur de pression (15) est susceptible de produire tout d'abord un liquide sous pression puis un gaz sous pression.
  8. Système d'assistance au stationnement (1) conforme à l'une des revendications 4 à 7,
    caractérisé par au moins un autre dispositif générateur de pression relié fluidiquement à la buse (19) montée sur le corps annulaire externe (6) pour permettre d'obtenir un fluide sous pression.
EP15702172.6A 2014-01-24 2015-01-21 Dispositif de nettoyage d'une lentille optique d'une caméra d'assistance au stationnement Active EP3096989B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014201327 2014-01-24
DE102014202072.7A DE102014202072A1 (de) 2014-01-24 2014-02-05 Vorrichtung zum Reinigen einer optischen Linse einer Parkassistenzkamera
PCT/EP2015/051050 WO2015110439A1 (fr) 2014-01-24 2015-01-21 Dispositif de nettoyage d'une lentille optique d'une caméra d'assistance au stationnement

Publications (2)

Publication Number Publication Date
EP3096989A1 EP3096989A1 (fr) 2016-11-30
EP3096989B1 true EP3096989B1 (fr) 2018-04-18

Family

ID=53523010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15702172.6A Active EP3096989B1 (fr) 2014-01-24 2015-01-21 Dispositif de nettoyage d'une lentille optique d'une caméra d'assistance au stationnement

Country Status (5)

Country Link
US (1) US9783167B2 (fr)
EP (1) EP3096989B1 (fr)
CN (1) CN105934376B (fr)
DE (1) DE102014202072A1 (fr)
WO (1) WO2015110439A1 (fr)

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DE102014202072A1 (de) 2015-07-30
EP3096989A1 (fr) 2016-11-30
CN105934376A (zh) 2016-09-07
CN105934376B (zh) 2017-10-24
WO2015110439A1 (fr) 2015-07-30
US9783167B2 (en) 2017-10-10
US20160325715A1 (en) 2016-11-10

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